Hyperfine Structure, Isotope, and Isomer Shifts in Hg193m, Hg194, Hg195m, and Hg195—Comments on the Paper of Kleiman and Davis

Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts. The results of this work are to be submitted by W. J. Tomlinson III to the Department of Physics, Massachusetts Institute of Technology, in partial fulfillment of the requirements for the dedegree of Doctor of Philosophy.

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Abstract

An analysis has been made of the discrepancies between the hfs and isotope shift results for Hg194, Hg195, and Hg195m of Kleiman and Davis [J. Opt. Soc. Am. 53, 822 (1963)] and our data, particularly in view of the importance of these results for our interpretation of the odd-even staggering effect in isotope shift [W.J.T. III and H.H.S., Phys. Rev. Letters 8, 436 (1962)]. Our hfs results have been confirmed by the more precise level-crossing experiments of W. W. Smith [Bull. Am. Phys. Soc. 8, 9 (1963)]. Errors in the work of Kleiman and Davis have been attributed, in part, to the presence of Hg197 and Hg197m in their sources. Experimental results are shown for the Hg194 isotope shift. We find Hg194-Hg196 isotope shift=0.146±0.010 cm-1, and a preliminary value Hg193m-Hg195m shift=0.150 cm-1. These results lend further support to our hypothesis on the causes of odd-even staggering in isotope shift.

Note added after submission of manuscript: The analysis above and the value for the 194–196 shift quoted for K and D in Table III are based on their original manuscript. Since the submission of our manuscript, they have revised their value to +143±10 mK which agrees with our measurements. They have subsequently obtained results for Hg193m which are also in agreement with our value (Paper MA11, 1963 Spring Meeting of the Optical Society of America).

Note added after submission of manuscript: The analysis above and the value for the 194–196 shift quoted for K and D in Table III are based on their original manuscript. Since the submission of our manuscript, they have revised their value to +143±10 mK which agrees with our measurements. They have subsequently obtained results for Hg193m which are also in agreement with our value (Paper MA11, 1963 Spring Meeting of the Optical Society of America).

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